812084128 has 12 divisors (see below), whose sum is σ = 1598790690. Its totient is φ = 406042048.

The previous prime is 812084123. The next prime is 812084131. The reversal of 812084128 is 821480218.

It can be written as a sum of positive squares in only one way, i.e., 450627984 + 361456144 = 21228^2 + 19012^2 .

It is a junction number, because it is equal to n+sod(n) for n = 812084093 and 812084102.

It is not an unprimeable number, because it can be changed into a prime (812084123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12688783 + ... + 12688846.

Almost surely, 2^812084128 is an apocalyptic number.

It is an amenable number.

812084128 is a deficient number, since it is larger than the sum of its proper divisors (786706562).

812084128 is a wasteful number, since it uses less digits than its factorization.

812084128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25377639 (or 25377631 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 34.

The square root of 812084128 is about 28497.0898163304. The cubic root of 812084128 is about 932.9685572258.

The spelling of 812084128 in words is "eight hundred twelve million, eighty-four thousand, one hundred twenty-eight".